How to verify CVE-2018-21247

Confirm whether your systems are actually affected — run the exact detection check below (Nuclei command or OpenVAS NVT). Detection only; it does not exploit.

Verify with OpenVAS

Greenbone/OpenVAS ships 20 NVT checks for CVE-2018-21247. OpenVAS detects this CVE by NVT OID — enable the NVT in your scan config, or confirm it is in your feed with the query below.

Confirm the NVT is in your feed (GMP)

gvm-cli socket --xml "<get_nvts nvt_oid='1.3.6.1.4.1.25623.1.0.704383' details='1'/>"

NVT OIDs (20)

1.3.6.1.4.1.25623.1.0.704383since 2026-06-25
1.3.6.1.4.1.25623.1.0.853286since 2026-06-25
1.3.6.1.4.1.25623.1.0.853301since 2026-06-25
1.3.6.1.4.1.25623.1.0.853309since 2026-06-25
1.3.6.1.4.1.25623.1.0.878094since 2026-06-25
1.3.6.1.4.1.25623.1.0.878098since 2026-06-25
1.3.6.1.4.1.25623.1.0.891617since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.1.2019.4383since 2026-06-25
1.3.6.1.4.1.25623.1.1.11.2021.1811since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.2.2018.1617since 2026-06-25

+ 10 more NVTs

New to OpenVAS? Greenbone documentation ↗

Confirmed exposed? That's one CVE on one host.

We check your whole external estate — hundreds of IPs and domains — for this and thousands more, on a schedule.

Scan my estate

Verify another CVE